William h



(No Model.)

W. H. PORTER.

APPLIANCE FOR PREVENTING INGRUSTATION. No. 425,903. Patented Apr. 15,1890.

V illi/am .Florfier X By 6, 4? 0M 7 W ooooooooooooooooooooooo c4 UNITED STATES PATENT OFFICE.

IVILLIAM H. PORTER, OF WVASHINGTON, DISTRICT OF COLUMBIA, ASSIGNOR OF TlVO-THIRDS TO CHARLES WV. SCHNEIDER AND CLARENCE BAKER,

OF SAME PLACE.

APPLIANCE FOR PREVENTING INCRUSTATION.

SPECIFICATION forming part of Letters Patent No. 425,903, dated April 15, 1890. Application filed July 20, 1889- Serial No. 318,176. (No model.)

To all whom it may concern:

Be it known that I, WILLIAM H. PORTER, of Washington, District of Columbia, have invented a certain new and Useful Appliance for Preventing Incrustation of Steam-Boilers, of which the following is a specification, reference being had to the accompanying draw- 111g.

The object of my invention is to provide for the use of a permanent magnet Within a steam-boiler in such a way as to prevent its incrustation or to remove scale when formed. To thisend I employ a permanent magnet within the boiler and connect it by its ends or poles preferably to the fines of the boiler, but always to some part below the water-line.

The drawing is a perspective View illustrating my invention applied to an ordinary steam-boiler having flues.

A is the shell of the boiler, B the fines, and C the permanent magnet, preferably of usual horseshoe form.

In practice I have found that a permanent magnet applied in a boiler in this Way and connected by both of its ends to the fines or 25 lower part of the boiler under water serves the purpose of preventing i-ncrustation admirably. The heat of the water can never be sufficient to disturb the efficient action of the magnet when magnetized so as to be of suffi- 3o cient strength. By usinga permanent magnet in this way very little room is taken up Within the shell. of the boiler, and the magnet can readilyberemoved and replaced, if required.

WVhat I claim is-- The combination, with a steam-boiler, of a permanent magnet appliedwithin the boiler, so that its ends or poles shall be in contact with the lower part of the boiler or its fines under water, substantially as set forth.

In testimony of all which I have hereunto subscribed my name.

W'ILLIAM ll. PORTER.

\Vitnesses:

J NO. B. CLARK, MARCUS S. HOPKINS. 

